Exit Menu

Global structural health monitoring of high-temperature steam lines

Circumferential steam line welds in nuclear plant are currently inspected at the planned outages used for all categories of plant maintenance, using conventional ultrasonic testing. The steam lines are composed of chrome-molybdenum-vanadium (CNV) steel, which has a fine-grained structure so that defects with dimensions as small as the wavelength are readily detectable with MHz frequency ultrasound. There are typically four steam lines per nuclear plant (reactor), containing some 500 welds. In practice, discrete (ie once only) measurements for weld defects are only made on around 20 per cent of the welds per planned outage, at intervals ranging from one-and-a half to four years, in order to limit the extra planned outage time required for inspection to two days. So total weld coverage is achieved only after around ten years (50 welds per year).

 

Objective

The project’s aim is the early detection of creep cracking, fatigue cracking and erosion thinning in superheated steam lines in nuclear plants, through the use of high-frequency long-range ultrasonic guided waves as a structural health monitoring system, permanently installed on line pipework.

Benefits

The UltraSteamLine technology is applicable to both existing and future nuclear power plants.

Project Partners

  •  Pi Ltg
  • Brunel University London
collar

View on YouTube https://www.youtube.com/watch?v=rh-ae0_8G68

Please accept all cookies to view this content. Alternatively view the content on YouTube


Meet the Principal Investigator(s) for the project


Related Research Group(s)

Brunel Innovation Centre

Brunel Innovation Centre - A world-class research and technology centre that sits between the knowledge base and industry.


Project last modified 27/10/2020